L3 Technologies AFIRS228S Manual Do Utilizador
AFIRS 228S Iridium Global Communications System Installation Manual
16 July 2014
L-3 Aviation Recorders Proprietary
Page 33
165E5733-00 Rev. 03
4.3 Iridium Antenna System
The Iridium SATCOM System has a single combined Iridium/GPS RF connection on the rear interface
connector, which is to be connected to a single combined Iridium/GPS Antenna. The antenna system
is comprised of all the components from the rear interface connector up to, and including, the
antenna. The total gain of the antenna system must be greater than
connector, which is to be connected to a single combined Iridium/GPS Antenna. The antenna system
is comprised of all the components from the rear interface connector up to, and including, the
antenna. The total gain of the antenna system must be greater than
0 dB at 1626.5 MHz (measured
at the antenna zenith).
Most Iridium antennas have a gain of +3 dBic at the zenith; therefore the maximum attenuation in the
rest of the antenna system must be less than 3 dB.
rest of the antenna system must be less than 3 dB.
4.3.1 Antenna Specifications
The antenna is a low-profile, circular device that can be mounted directly to the aircraft fuselage, and
connects to the Iridium SDU through a coaxial cable – see Figure 3-8.
connects to the Iridium SDU through a coaxial cable – see Figure 3-8.
Weight (Typical)
0.170 kg (6 oz.)
Height (Typical)
16.8 mm (0.66 inches)
Diameter (Typical)
89 mm (3.5 inches)
Manufacturer’s Reference
Documentation
Documentation
Drawing 009E5733-00, Revision B
Iridium Antenna – Passive, 1565 – 1626.5 MHz
RHCP – see Figure 4-2.
Iridium SATCOM System Supplier Equipment
Specification: Doc. No. 905-E5750-07, Revision N
Specification: Doc. No. 905-E5750-07, Revision N
Environmental
The Iridium SATCOM System antenna meets the environmental requirements of RTCA
DO-262A, where applicable, as referenced in Doc. No. 905-E5809-42, Revision C.
DO-262A, where applicable, as referenced in Doc. No. 905-E5809-42, Revision C.
Testing was performed to DO-160F, MIL-STD-810, EN-60068, ISO-2669, and the
applicable ABDs, unless otherwise noted.
applicable ABDs, unless otherwise noted.
Temperature
-55° C (-67° F); to +85° C (+185° F)
Altitude
-100 to +55,000 FT
Vibration
10 Gs (DO-160D/E F2-AB)